The emission characteristics of nitrous oxide and nitric oxide and related influence factors in an aeration tank of a municipal wastewater treatment plant using an A2/O process
HAN Hai-cheng, ZHOU Dong, WANG Ya-yi, CHEN Jie, SONG Cheng-kang
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
In this study, online N2O and NO analyzer were used to monitor N2O and NO emissions in different zones of the aeration tank of a municipal wastewater treatment plant. Parameters such as ammonia, nitrite, nitrate, dissolved oxygen (DO) and pH were also measured to reveal their influence on N2O and NO emissions. The results showed that the DO concentration of the aeration tank was between 0.24 mg/L and 1.12 mg/L, and mostly at approximately 0.6 mg/L. The low DO concentration led to the nitrite accumulation along the aeration tank. The N2O and NO emission rose along the aerobic tank and ultimately reached the maximum value at the end of the aeration tank. Besides, NO emission was significantly and positively correlated with the nitrite concentration, while the N2O emission was less significant. The N2O and NO emission factors of the wastewater treatment plant were 6.3~8.83% and 0.033~0.034% of influent ammonia.
韩海成, 周东, 王亚宜, 陈杰, 宋成康. 城市污水A2/O处理系统好氧池N2O和NO的释放特征及影响因素[J]. 中国环境科学, 2016, 36(2): 398-405.
HAN Hai-cheng, ZHOU Dong, WANG Ya-yi, CHEN Jie, SONG Cheng-kang. The emission characteristics of nitrous oxide and nitric oxide and related influence factors in an aeration tank of a municipal wastewater treatment plant using an A2/O process. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(2): 398-405.
Hao X, Liu R, Huang X. Evaluation of the potential for operating carbon neutral WWTPs in China[J]. Water Research, http://dx.doi.org/10.1016/j.watres.2015.05.050.
[2]
IPCC-Intergovernmental Panel on Climate Change.Climate change 2007-the scientificbasis[R]. Contribution of Working Group I to the fourth assessment report of the Intergovernmental Panel on Climate Change. Cambridge, UK:Cambridge University Press, 2007.
[3]
Kampschreur M J, Temmink H, Kleerebezem R, et al. Nitrous oxide emission during wastewater treatment[J]. Water Research, 2009,43(17):4093-4103.
[4]
Kampschreur M J, Tan N C, Kleerebezem R, et al. Effect of dynamic process conditions on nitrogen oxides emission from a nitrifying culture[J]. Environmental Science & Technology, 2007,42(2):429-435.
[5]
Ostrom N E, Sutka R, Ostrom P H, et al. Isotopologue data reveal bacterial denitrification as the primary source of N 2O during a high flux event following cultivation of a native temperate grassland[J]. Soil Biology and Biochemistry, 2010,42(3):499-506.
[6]
Peng L, Ni B, Erler D, et al. The effect of dissolved oxygen on N 2O production by ammonia-oxidizing bacteria in an enriched nitrifying sludge[J]. Water Research, 2014,66:12-21.
[7]
Ahn J H, Kim S, Park H, et al. N2O emissions from activated sludge processes, 2008-2009:results of a national monitoring survey in the United States[J]. Environmental Science & Technology, 2010,44(12):4505-4511.
[8]
Foley J, De Haas D, Yuan Z, et al. Nitrous oxide generation in full-scale biological nutrient removal wastewater treatment plants[J]. Water Research, 2010,44(3):831-844.
[9]
Yan X, Li L, Liu J. Characteristics of greenhouse gas emission in three full-scale wastewater treatment processes[J]. Journal of Environmental Sciences, 2014,26(2):256-263.
[10]
Czepiel P, Crill P, Harriss R. Nitrous oxide emissions from municipal wastewater treatment[J]. Environmental Science & Technology, 1995,29(9):2352-2356.
[11]
Law Y, Ye L, Pan Y, et al. Nitrous oxide emissions from wastewater treatment processes[J]. Philosophical Transactions of the Royal Society B:Biological Sciences, 2012,367(1593):1265-1277.
[12]
Jin L, Zhang G, Tian H. Current state of sewage treatment in China[J]. Water Research, 2014,66:85-98.
[13]
Crutzen P J. The role of NO and NO2 in the chemistry of the troposphere and stratosphere[J]. Annual Review of Earth and Planetary Sciences, 1979,7:443-472.
Wiesmann U. Biological nitrogen removal from wastewater[J]. Biotechnics/wastewater, 1994:113-154.
[17]
Aboobakar A, Cartmell E, Stephenson T, et al. Nitrous oxide emissions and dissolved oxygen profiling in a full-scale nitrifying activated sludge treatment plant[J]. Water Research, 2013,47(2):524-534.
[18]
Duarte A G, Cordas C M, Moura J J, et al. Steady-state kinetics with nitric oxide reductase (NOR):New considerations on substrate inhibition profile and catalytic mechanism[J]. Biochimica et Biophysica Acta (BBA)-Bioenergetics, 2014, 1837(3):375-384.
[19]
Law Y, Ni B, Lant P, et al. N2O production rate of an enriched ammonia-oxidising bacteria culture exponentially correlates to its ammonia oxidation rate[J]. Water Research, 2012,46(10):3409-3419.
Tallec G, Garnier J, Billen G, et al. Nitrous oxide emissions from secondary activated sludge in nitrifying conditions of urban wastewater treatment plants:effect of oxygenation level[J]. Water Research, 2006,40(15):2972-2980.
